In the Salvador shots of the Matt picture set there is a Whiteboard reference to 19BC. And 19 BC is shown on a building that he has shots of.

Turns out that 19 BC is military base: 2° Companhia do 19° Batalhão de caçadores Operacionais (You Tube Link here)

And if you watch the video you will see the Badge for the 19° BC. That same Badge appears on the sticker that Mr. Purple Shirt wears. But in the sticker it is in conjunction with Film Planet Group. They boast about doing work for TAR before (Season 9).

I think in, sum and substance, 19 BC will turn out to be nothing more than just a dormitory for production.